柳枝稷种植年限对土壤盐分离子的影响

发布时间：2019-01-16 08:36

【摘要】：为探明能源植物柳枝稷对盐碱土的改良效果,于2014—2015年,在宁夏大学西大滩盐碱地改良试验站田间条件下,设置1、3、5 a3个不同种植年限柳枝稷处理(T1、T3、T5),以附近未种植柳枝稷的盐碱荒地作为对照(CK),研究了不同种植年限柳枝稷对盐碱土盐分离子的影响。结果表明,随着种植年限增加,柳枝稷对土壤盐分离子的作用效果增强,土壤中的Na~+、SO_4~(2-)、Cl~-含量随种植年限增加而降低,在柳枝稷生育末期T5处理与CK相比,Na~+、SO_4~(2-)、Cl~-含量分别下降了52.64%、40.37%和63.68%;土壤中的Ca~(2+)、Mg~(2+)含量与柳枝稷种植年限呈正相关关系,在柳枝稷生育末期T5处理Ca~(2+)、Mg~(2+)含量分别比CK增加了2.22%、48.08%。本试验条件下,柳枝稷种植5年后对土壤Na~+、SO_4~(2-)和Cl~-等盐分离子的降低作用最为明显。
[Abstract]:In order to find out the effect of the energy plant switchgrass on the improvement of saline-alkali soil, in 2014-2015, under the field condition of Xidatan Salt and Alkali Land improvement Test Station of Ningxia University, three different planting years of switchgrass (T1T3 + T5) were set up in Xidatan, Ningxia University. The effect of switchgrass on salt ions in saline-alkali soil was studied by using saline-alkali wasteland of nearby uncultivated switchgrass as control (CK),. The results showed that the effect of switchgrass on soil salt ions increased with the increase of planting years, and the contents of Na~, SO_4~ (2-) and Cl~- in soil decreased with the increase of planting years. T5 treatment of switchgrass was compared with CK at the late stage of growth and development of switchgrass. The contents of Na~, SO_4~ (2-) and Cl~- decreased by 52.64% and 63.68%, respectively. The contents of Ca~ (2) and Mg~ (2) in soil were positively correlated with the planting years of switchgrass. The contents of Ca~ (2) and Mg~ (2) in T5 treatment of switchgrass at the late stage of growth and growth of switchgrass were increased by 2.22 ~ 48.08 compared with CK, respectively. Under the experimental conditions, the salt ions such as Na~, SO_4~ (2-) and Cl~- in soil were decreased most obviously after 5 years of cultivation of switchgrass.
【作者单位】：宁夏大学环境工程研究院;宁夏大学农学院;
【基金】：国家自然科学基金(31560361) 宁夏自治区级大学生创新创业训练计划项目(20150130)
【分类号】：S156.4

【相似文献】